L2PTv3 transport CDP, VTP, STP

Layer 2 Tunneling Protocol(L2TP)可以傳送CDP, VTP, STP跨越SP Backbone,這是Dot1q Tunneling(請參考Q-in-Q(Dot1Q Tunnel) Sample Configuration)的額外附加功能,預設並未啟用,啟用的指令如下:

SW1(config)#int f0/1
SW1(config-if)#l2protocol-tunnel cdp
SW1(config-if)#l2protocol-tunnel stp
SW1(config-if)#l2protocol-tunnel vtp

SW2(config)#int f0/1
SW2(config-if)#l2protocol-tunnel cdp
SW2(config-if)#l2protocol-tunnel stp
SW2(config-if)#l2protocol-tunnel vtp
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